#my_name：Yan Zihao(Mike)
#my_email：1752041815@qq.com

#先输入温度
temperature = int(input("Please enter the temperature: ").strip())
#再来输入星期
day = input("Please enter the day: ").strip().lower()
#判断温度和日期是否符合去沙滩的标准
if 20 < temperature < 30 and (day == 'saturday' or day == 'sunday'):
    print("Let's go to the beach!")
else:
    print("No beach today!")
